Formula: Na2CuPb3(CO3)5
Origin of name: For the Chilean naturalist (mineralogy and geology) Francisco J. San Román (1834-1902)
Crystal system: Hexagonal
Crystal class: 6mm
Twinning:
Unit cell: a = 10.553, c = 6.6441
Colour: Colourless, green-yellow
Diaphaneity:
Luster:
Habit:
Hardness:
Specific gravity: 5.2
Cleavage:
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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